Difference between RAID 0 and RAID 1+0

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Difference between RAID 0 and RAID 1+0

elea.grig

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August 20, 2018 at 12:47 pm

#362036

What is the difference between this two?

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Lynn Pettis SSC Guru Points: 442467 More actions · Answer 1

https://www.google.com/search?q=Difference+between+RAID+0+and+RAID+1%2B0

Jonathan AC Roberts SSCoach Points: 18263 More actions · Answer 2

elea.grig - Monday, August 20, 2018 12:47 PM
What is the difference between this two?

Raid 0 RAID 0 (also known as a stripe set or striped volume) splits ("stripes") data evenly across two or more disks, without parity information, redundancy, or fault tolerance. Since RAID 0 provides no fault tolerance or redundancy, the failure of one drive will cause the entire array to fail; as a result of having data striped across all disks, the failure will result in total data loss. This configuration is typically implemented having speed as the intended goal.[2][3] RAID 0 is normally used to increase performance, although it can also be used as a way to create a large logical volume out of two or more physical disks. RAID 0 can be created with disks of differing sizes, but the storage space added to the array by each disk is limited to the size of the smallest disk.

Raid 1 is mirrored so a file will exist in more than one disk and can recover from a disk failure. This has slow write performance as the file has to be written to two disks.
Raid 1+0, also called RAID 10 and sometimes RAID 1&0, is similar to RAID 01 with an exception that two used standard RAID levels are layered in the opposite order; thus, RAID 10 is a stripe of mirrors.
RAID 10, as recognized by the storage industry association and as generally implemented by RAID controllers, is a RAID 0 array of mirrors, which may be two- or three-way mirrors,[6] and requires a minimum of four drives. However, a nonstandard definition of "RAID 10" was created for the Linux MD driver; Linux "RAID 10" can be implemented with as few as two disks. Implementations supporting two disks such as Linux RAID 10 offer a choice of layouts. Arrays of more than four disks are also possible.
In most cases RAID 10 provides better throughput and latency than all other RAID levels except RAID 0 (which wins in throughput). Thus, it is the preferable RAID level for I/O-intensive applications such as database, email, and web servers, as well as for any other use requiring high disk performance. 1+0 is often the choice for storing database files.

Lynn Pettis SSC Guru Points: 442467 More actions · Answer 3

Jonathan AC Roberts - Monday, August 20, 2018 1:05 PM
elea.grig - Monday, August 20, 2018 12:47 PM
What is the difference between this two?
Raid 0 is striped so a file will be split across more than one disk
Raid 1 is mirrored so a file will exist in more than one disk and can recover from a disk failure. This has slow write performance as the file has to be written to two disks.
Raid 0+1 is stripped across at least 3 disks with parity info so that a file can be recovered if there is a single disk failure. This offers performance and recovery, whereas Raid 0 offers no recovery on a disk failure and Raid 1 does not perform as well as Raid 0. This is often chosen for storing database files.

Nope, your Raid 0 + 1 definition is wrong. There is no parity bit in Raid 0 + 1 or Raid 1 + 0 and they are different.

Lynn Pettis SSC Guru Points: 442467 More actions · Answer 4

Check this link: https://www.diffen.com/difference/RAID_0_vs_RAID_1

Jonathan AC Roberts SSCoach Points: 18263 More actions · Answer 5

Lynn Pettis - Monday, August 20, 2018 1:37 PM
Check this link: https://www.diffen.com/difference/RAID_0_vs_RAID_1

Thanks, I'll update my answer.